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PR2/6 Soil Profile Moisture Speedometer

Updated:2025-03-13

Brand: Delta-T
Model: PR2
Description: No other soil moisture probe system enables you to monitor your soil water profiles with such ease and flexibility. Install an access tube into the soil, insert the PR2 Profile Probe and press the HH2
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Product Details

PR2/6 Soil Profile Moisture Speedometer Description：

User's Manual Getting Started Guide

The PR2 Profile Probe is available in two sizes to measure to a depth of 40 cm or 100 cm.

The PR2/4 has sensing elements at 10/20/30/40 cm

The PR2/6 has sensing elements at 10/20/30/40/60 and 100 cm

HH2 Meter

The HH2 is a versatile readout unit that provides an easy and convenient way to display and store readings from Profile Probes. With the HH2 and PR2 combination, a probe can be moved from access tube to access tube, enabling large amounts of soil moisture data to be collected at multiple sites.

Data Logging

Profile Probes are available with analogue or SDI-12 outputs.

For the analogue version, order PR2/4 or PR2/6.

For the SDI-12 interface version, order PR2/4-SDI-12 or PR2/6-SDI-12.

Please note that analogue and SDI‐12 probes cannot be mixed on the same cable system

Loggers for analogue Profile Probes

Delta-T offers a choice of two data suitable data loggers. Both have dedicated PR2 Profile Probe input channels and connectors:

The DL6 Data Logger can log one PR2/6 or one PR2/4 Profile Probe

The GP2 Data Logger can log up to two PR2/6s or three PR2/4s

Loggers for SDI-12 Profile Probes

The PR2 SDI‐12 is ideally matched to the SDI‐12 enabled GP2 Data Logger. Many SDI-12 Profile Probes can be connected to a single GP2 (actual number depends on cable length, power, and other considerations).

Augering and Extraction Kits – for optimal Access Tube installation

Pro?le Probes are used within access tubes inserted into augered holes in the soil – correct installation is vital for accurate measurement of soil moisture pro?les. The goal of installation is to produce optimal contact between the soil and the wall of the access tube. The augered holes should be straight, smooth sided and the correct diameter.

Feature

Soil moisture content profiles down to 1m

Dual purpose – installed and portable

Uses access tubes for easy probe insertion and removal

SDI-12 interface option available

Strength

Highly reliable field-proven instrument

Soil moisture content – not just trends

Out of the box solution – supplied with calibrations for common soil types

Portable meter option for multi-site measurement

PR2/6 Soil Profile Moisture Speedometer Specification：

Measurement	Volumetric water content
Accuracy	± 0.04 m ³ .m ^-3 (4%) With soil-specific calibration
Soil moisture measurement range	Full accuracy over: 0 to 0.4 m ³ .m ^-3
Soil moisture measurement range	Full range :0 to 1.0 m ³ .m ^-3
Salinity range	50 to 400 mS.m ^-1
Salinity range	Salinity errors included in calibration
Temperature range	Full accuracy over: 0 to 40°C
Output	(ANALOGUE) 0 to 1.0 V differential PR2/6: x6 outputs, PR2/4: x4
Output	(SDI-12) Digital
Power requirement	(ANALOGUE) 5.5-15 V, PR2/6: ~120 mA for 1s PR2/4: ~80 mA for 1s Minimum 7.5 V with 100 m cable
Power requirement	(SDI-12) Power consumption < 60 mA at 12 V DC Sleep current < 2 mA at 12 V DC
Environmental	IP67 (when installed in access tube)
Sample volume	-95% sensitivity within a cylinder of diameter 200mm
Sample volume	Sample volume is weighted towards soil immediately surrounding the rods
Dimensions and weight	PR2/6: length 1350 mm PR2/4: length 750 mm Both: 25.4 mm diameter PR2/6: weight 1.2 kg PR2/4: weight 0.8 kg
Sensor calibrations	Individual sensors are interchangeable Recalibration advised every 3 years (depending on use)
Soil calibrations	Generalised Mineral and Organic soil calibrations are supplied